Charging/powering down issues.

My S4 stopped charging a few days ago. I left the charger in for about a day and it ended up charging and had probably 3-4 successful charges after that. It has just stopped charging again and will not stay off. It powers down but immediately turns back on.

If this is a problem with the USB, it is covered by the AT&T year warranty. However, I am nervous if it is due to some unknown damage due to water or a fall they wont send the phone back to me so I can replace the USB myself. I've been trying to get an answer from AT&T with no success. I am very tempted to replace it but I'd rather not void the warranty if I don't have to.

Has the moister indicator on the battery changed color? Have you dropped it? If your USB port has went bad and it's not you're fault, then I don't see why it wouldn't covered under warranty, but that 1 year warranty is most likely from Samsung instead of AT&T. Carriers usually only offer insurance plans. Speaking of which...do you have the insurance on it?

i have dropped it once with a good case. The battery strip is still white. There has been very mild exposure to fluids but it was awhile ago and nothing near submersion.

I have insurance but it only offers a discounted repurchase price. It sucks because its either a $15 fix and a loss of warranty or the possibility that samsung takes it from me after I send it to them because they find some sort of evidence of damage.